OPERATOR’S MANUAL - Northern Lights
OM844W2For Models: M844W2, M844LW2, and M20CRW2OPERATOR’S MANUALMarine Generators Marine Diesel Engines Land-Based Generators
— CALIFORNIA —Proposition 65 Warning:Diesel engine exhaust and some of its constituents are known to the State of California to causecancer, birth defects, and other reproductive harm.Northern Lights4420 14th Avenue N.W.Seattle, WA 98107Tel: (206) 789-3880Fax: (206) 782-5455Copyright 2009 Northern Lights, Inc.All rights reserved. Northern Lights , andthe Northern Lights logo are trademarks ofNorthern Lights, Inc.Printed in U.S.A.PART NO.: OM844W2 10/09
OPERATOR'S MANUALfor ModelsM844W2, M844LW2, and M20CRW2Read this operator's manual thoroughly before starting to operate your equipment.This manual contains information you will need to run and service your new unit.Table of ContentsSERVICING (continued)V-Belts .15Valve Clearances .15Fuels - General .16Fuel Filters .16Bleeding the Fuel System .17Injector Service .18 - 19Injection Pump .19Cooling System - General .19Cooling System Flushing .20Heat Exchanger .20Raw Water Pump .20Generator Ends .20Electrical System - General .20Glow Plugs.21Booster Batteries .21Battery Care .21PTO Care .21Winterizing / Out-of-Service .21INTRODUCTION . 4Models Included . 4Model Numbers . 4Serial Numbers . 5WARRANTY . 5SAFETY RULES . 5COMPONENT LOCATIONSM844W2 Marine Generator . 6M20CRW2 Commercial Generator . 7CONTROL PANELS . 8OPERATING PROCEDURESBreak-in Period . 9Before Starting . 9Starting . 9Operating . 9Stopping . 9Shutdowns and Alarms .10Spare Parts .10SERVICING SCHEDULE CHART .12TROUBLESHOOTINGElectrical .22Engine .23 - 25WIRING DIAGRAMSAC Electrical .26DC Electrical .27 - 30SERVICINGLubrication - General .14Checking Oil .14Oil Changes .14Changing Oil Filter .14Air Filter .15Proprietary InformationThis publication is the property of Northern Lights, Inc.It may not be reproduced in whole or in part without the written permission of Northern Lights, Inc. Northern Lights, Inc. All rights reserved. Litho U.S.A. Publication number OM844W2 10/09OM844W2 10/093
IntroductionFailures can begin with minor problems that are overlooked and become amplified when not corrected duringroutine maintenance.Servicing of marine engines and generator sets presentsunique problems. In many cases boats cannot be movedto a repair facility. Marine engines cannot be comparedto the servicing of automobiles, trucks or even farmequipment. Failures often occur in remote areas farfrom competent assistance. Marine engines are taxedfar more severely than auto or truck engines; therefore,maintenance schedules must be adhered to morestrictly.As operator, it is your obligation to learn about yourequipment and its proper maintenance. This is not acomprehensive technical service manual. Nor will itmake the reader into an expert mechanic. Its aim is toaid you in maintaining your unit properly.Unit IdentificationMODELS INCLUDEDThis manual covers the operating instructions for:M844W2 marine generator sets,M844LW2 marine generator sets, andM20CRW2 commercial generator sets.NOTE: There are two versions of the 844W2 engine. The standard engine is designated 844W2. The long-strokeengine is designated 844LW2. You will need to know which engine you have to use this manual and to order parts.Fill in the model number of your unit in the blank space provided.This will give you a reference whenever service or maintenance is required:My Northern Lights generator set MODEL number is:Model NumbersModel numbers give the unit's application, block model, aspiration, and RPM:MM - Northern Lights marine generator set844 W, L, C, 2Model number of engine blockBoreCylinders84 mm4M844W2 Northern Lights marine diesel generator set withan 844 engine and a PX-316K2 generator end.M844LW2 Northern Lights marine diesel generator set withan 844L engine and a PX-320K2 generator end.M20CRW2OM844W2 10/094 W - New windingL - Long stroke versionC - Commercial version2 - Tier 2 CompliantNorthern Lights 20 kW (@ 60 Hz) commercial grademarine generator set with a special generator end.
Serial NumbersYour set has three serial numbers: 1 an engine number stampedon the block, 2 a generator plate, and 3 a generator set plate.Use the serial number on the generator set plate when ordering partsor in correspondence. The generator set plate is found on the serviceside of the generator and resembles the drawing at left.Generator set serial number plate.WarrantyA warranty registration certificate is suppliedwith your set. It entitles the original purchaser of ourequipment to a warranty covering materialor assembly faults. The extent of coverage is describedin the Limited Warranty Statement. We recommendthat you study the statement carefully.NOTE: If the warranty is to apply, the servicinginstructions outlined in this manual must befollowed. If further information is needed, pleasecontact an authorized dealer or the factory.Safety RulesCAUTION: Accident reports show that careless use of engines causes a high percentage of accidents.You can avoid accidents by observing these safety rules. Study these rules carefully and enforce them on the job. Never leave engine without proper security. Keep your hands, feet, hair and clothing away frompower-driven parts. Turn the coolant tank cap slowly to relieve pressurebefore removing. Add coolant only when the engineis stopped and cool. Check for any loose electrical connections or faultywiring. Mount a fire extinguisher near engine. Engines should be operated only by knowledgeable,qualified personnel. Always disconnect the battery ground strap beforemaking adjustments. Look completely around engine to make sure thateverything is clear before starting. Operate engines in properly ventilated areas. Do not operate an engine that isn't in proper working order. If an unsafe operating condition is noted,tag the set and control panel so others will alsoknow about the problem. Keep trash and other objects away from engine. Escaping fluids under pressure can penetrate yourskin. Use a piece of cardboard or wood, not yourhands, to search for leaks. Provide first aid kits. Avoid wearing loose clothing without a belt whenworking around engines. Do not oil or grease engine while it is running. Use caution in handling fuel. Never refuel a hotor running engine. Do not smoke while filling fueltank or servicing fuel system.CAUTION: This symbol is used throughoutthis book to alert you to possible danger areas.Please take special notice of these sections.OM844W2 10/095
Marine Generator Component Locations Non-ServiceSideService SideFigure 1A and 1B: M844W21.2.3.4.5.6.7.8.9.DC Circuit BreakerCoolant Recovery TankSecondary Fuel FilterFuel Return LineFuel InjectorOil Fill (Top)Coolant FillFresh Water PumpInjection Pump10.11.12.13.14.15.16.17.18.Oil Fill (Side)Raw Water PumpRaw Water InletVibration MountOil Pressure SenderFreshwater Block DrainFuel Inlet LineFuel Return LineOil Dipstick19.20.21.22.23.Oil FilterLube Oil DrainFuel Lift PumpControl Panel Plug-inAC Circuit Breaker forAutomatic Voltage RegulatorExpansion Tank/ExhaustManifold/Heat Exch.Tank24.OM844W2 10/09625.26.27.28.29.30.31.32.Coolant DrainWet Exhaust ElbowJunction BoxStarterAlternatorBelt GuardCoolant Thermostat (behind)Water Temperature Sender
Commercial Generator Component LocationsFigure 2A and 2B: M20CRW21.2.3.4.5.6.7.8.9.DC Circuit BreakerSecondary Fuel FilterFuel Return LineFuel InjectorOil Fill (Top)Coolant FillFresh Water PumpInjection PumpOil Fill (Side)10.11.12.13.14.15.16.17.18.Raw Water PumpRaw Water InletVibration MountOil Pressure SenderFreshwater Block DrainOil DipstickOil FilterOil DrainFuel Lift Pump19.20.21.22.23.Control Panel Plug-inAC Circuit Breaker forAutomatic Voltage RegulatorExpansion Tank/ExhaustManifold/Heat Exch.TankCoolant DrainWet Exhaust ElbowOM844W2 10/09724.25.26.27.28.29.Junction BoxStarterAlternatorBelt GuardCoolant Thermostat (behind)Water Temperature Sender
Control Panels1. SHUTDOWN BYPASS-PREHEAT SWITCHTwo functions are built into this switch: the preheating of the engine, and bypassing of the engine safetyshutdown circuit. Hold switch in the ON position10 - 20 seconds before starting the engine, andcontinue holding on during engine cranking. Releasethe switch as soon as the engine is running. Holdingthe switch on too long can burn out the heater element.2. ENGINE CONTROL SWITCHTo start the engine, hold this switch in the STARTposition until the engine is running.NOTE: Excessive cranking of marine sets equippedwith water lift muffler systems can cause enginedamage. See page 7.After the engine starts, release the switch and it willreturn to RUN position. To stop the engine, hold theswitch in the STOP position until the engine hascompletely stopped.NOTE: The rocker switch is used on Series 1 panelsonly, and has a light that glows when the set is running.Figure 3-A: Series 1-B Generator Control Panel3. HOUR METERKeeps track of engine running time.4. OIL PRESSURE GAUGEShows the oil pressure in the engine lubricating system.5. ENGINE TEMPERATURE GAUGERegisters the temperature of the engine coolant.Figure 3-B: Series 3 Generator Control Panel6. D.C. VOLTMETER OR AMMETERWhen the engine is stopped, the voltmeter indicates thecondition of the battery. When the engine is running, thevoltmeter indicates the voltage output of the alternator.For Series 4 Control Panels Only:7. A.C. VOLTMETERShows the generator output voltage.8. FREQUENCY METER (Hertz)The frequency meter indicates alternating currentfrequency: 60 Hz (1800 RPM), or 50 Hz (1500 RPM).9. AMMETER/VOLTMETER SELECTORSWITCHUsed to check voltage and current of each phase.10. A.C. AMMETERShows the generator load on each phase. The phase isselected with the Ammeter Selector switch (Item 9).Figure 3-C: Series 4 Generator Control PanelOM844W2 10/098
Operating ProceduresBREAK-IN PERIODSTARTING1. The first 100 hours on a new or reconditionedengine are critical to its life and performance.2. Frequently check the engine temperature and oilpressure gauges (sets with Series 3 or 4 panels).3. Oil consumption is greater during break-in aspiston rings take time to seat.4. Break-In Oil Changes: Change engine oil andfilter at 50 hours. Change oil and filter again at100 hours (consult Lubricants section for oilrecommendation).1. Hold the Shutdown Bypass-Preheat switch in theON position for 10 to 20 seconds before starting acold engine. Holding the switch too long can burnout the glow plugs. This step is not necessary if theengine is already warm.2. While holding the Shutdown Bypass-Preheat switchin the ON position, push the Engine Control switchto the START position.3. As soon as the engine starts, release both switches. Donot crank the starter for more than 10 secondsconsecutively. If the engine fails to start with the firstattempt, be sure that it has stopped completely (wait atleast 30 seconds) before re-engaging.NOTE: Excessive cranking of the starter on Marinesets equipped with a water lift muffler can cause enginedamage. If the engine does not start after three 20second cranks, remove the impeller from the raw waterpump. This will prevent the muffler from filling withwater and backfilling the exhaust line and engine.Once the engine starts, shut it off immediately andre-install the impeller. Re-start the engine and checkthe exhaust overboard outlet for gushes of water.Operating Instructions:Maintain at least a 75% load on your generatorset for the first 100 hours. If this is not possible,maintain no less than a 50% load to ensure properseating of the piston rings. Vary the load to helpseat the rings.BEFORE STARTING1. Check the water level by removing the pressurecap from the expansion tank or radiator. In order togive the cooling water an opportunity to expand, thelevel should be about 1 in. (2.5 cm) below the fillercap sealing surface when the engine is cold.OPERATING1. Units with Series 3 and Series 4 Control Panels:check gauges often. Oil pressure must be above 15PSI. The D.C. voltmeter should read between 11 and15 volts at 80 F (25 C) ambient temperature. Thewater temperature gauge on Marine sets must bebelow 200 F (94 C). Normal coolant temperatureis 167 to 194 F (75 C to 90 C). Check the A.C.voltage and frequency meters (Series 4 panel). If thegauges deviate from normal levels, shut down thegenerator set and investigate.2. Let the unit run unloaded for a three to five minutewarm-up period.3. Apply electrical load.CAUTION: Use protective clothing and openthe filler cap carefully when the engine iswarm to prevent burns.2. Check the oil level in the crankcase with the dipstick. The oil level must be in the waffled area on thestick. Never allow the level to go below this area.Always add the same viscosity of oil as is already inthe crankcase.3. Check the fuel tank level and open any fuel valves.4. Close the sea-cock; check, clean, and reassemble thesea strainer and re-open the sea-cock.5. Place the battery switch in the ON position.6. NOTE: The battery switch must always be keptON while the engine is running. If the switch isturned OFF while the engine is running, thebattery charging regulator could be ruined.STOPPING1. Remove electrical load from the generator set.2. Run the engine for a 3 to 5 minute cool down period.3. Hold the Engine Control switch to the STOP positionuntil the engine comes to a complete stop.4. Shut off the seacock, fuel valve, and battery switch.OM844W2 10/099
Operating ProceduresSHUTDOWNS AND ALARMSSPARE PARTS1. Your unit is fitted with a system to protect it fromhigh water temperature or low oil pressure.a. Generator sets have shutdown systems to stop theengine. They have no warning horns.b. Other alarms and shutdowns are available asoptional equipment.NOTE: Do not rely on your warning to theexclusion of careful gauge monitoring. Watchingyour gauges can prevent damage to the unit anddangerous power losses.2. Do the following when your warning or shutdownsystem is activated:a. Check the temperature gauge.If above 205 F (96 C), shut off the engineimmediately.b. Use the Trouble Shooting Guide on page 22 toisolate the cause of the overheat.1. Northern Lights recommends that you keep thefollowing spare parts on hand for field service. Theparts are available from your local Northern Lightsdealer.Some marine models already have “On-Board-Kits,”a handy box that contains the most common partsyou will need.2. All owners should have the following spares:a. Primary and secondary fuel filter elementsb. Oil filtersc. Air filterd. Alternator belte. Thermostat and gasketsf. Seawater pump impeller & gasketsg. Glow plugh. Injector and washer3. If your set is operating a long distance from aservicing dealer, add the following:a. Complete set of injectorsb. Copper washers for injector changec. Complete set of glow plugsd. Fuel lift pumpCAUTION: Do not remove the water fillcap of an overheated engine. Escaping hightemperature steam can cause severe burns.Allow the engine to cool and then remove the capslowly using protective clothing.d. Make repairs. Restart your Marine set after thetemperature gauge registers below 200 F (94 C).e. Watch the temperature gauge regularly andturn off the unit if the temperature risesabove 205 F (96 C) on Marine units.Repeat troubleshooting.3. If shutdown is activated and the temperature gaugeshows temperature within normal temperature range:a. Check the engine crankcase oil level.b. If the oil level is low, fill with recommendedlubricating oil and restart. Watch the oil pressuregauge carefully and shut off the engine if it doesnot show a normal reading (20-60 PSI) after afew seconds of operation.c. If the oil level is normal, DO NOT restart theengine. Call your dealer for assistance.OM844W2 10/0910
NotesOM844W2 10/0911
Servicing Schedule ChartThe Servicing Schedule Chart below shows the service schedule required for proper maintenance of your generatorset. More detailed coverage of each Service Point (SP) is listed on the page noted in the ‘page’ column.DAILY:SP1SP5SP7SP13EVERY 500 HOURS:SP8 Change primary fuel filter elementSP9 Change secondary fuel filterSP22 Inspect condition of exhaust elbowCheck oil level in engineCheck V-belt tensionCheck primary fuel filterCheck coolant levelCheck sea strainerCheck raw water pump for leaksSP18 Check electrolyte in batteriesEVERY 1000 HOURS:SP6 Check valve clearancesSP11 Check injectorsSP17 Change impellerAFTER FIRST 50 HOURS:SP2/3 Change engine oil and filterSP6 Adjust valvesEVERY 2500 HOURS:SP12 Check fuel injection pumpSP14 Check and flush cooling systemSP15 Check and clean heat exchangerAFTER FIRST 100 HOURS:SP2/3 Change engine oil and filterEVERY 250 HOURS:SP2/3 Change engine oil and filterSP4 Check air cleanerSP19 Check state of charge of batteriesSERVICEPOINTPAGEOPERATIONSP114Check oil levelSP214Change engine oil1) 5)SP314Change lube oil filters1) 5)SP415Check air cleaner, change element @ 1000 hrs. 1) 4)SP515Check V-belt tensionSP615Check valve clearancesSP716Check primary filter (Racor)2) 3)SP816Change primary filter element (Racor)2) 3)SP916Change secondary fuel filter1) 3)DAILY50Hours250Hours 500Hours1000Hours2500HoursENGINE: 1) 2)FUEL SYSTEM:SP1017SP1118 - 19SP1219Bleed the fuel system 3)Check injectors 1) 3) 6) 7)Check fuel injection pump 7)COOLING SYSTEM: SP1319Check coolant levelSP1420Check and flush cooling systemSP1520Check and clean heat exchangerSP1720Change impeller in raw water pump1) 3)Inspect condition of exhaust elbow4) SP22 ELECTRICAL SYSTEM: SP1821Check electrolyte level in batteriesSP1921Check condition of batteries with hydrometerSP2021Clutch and PTO serviceSP2121Winterizing or out-of-service 1) 4)DRIVEN EQUIPMENT:2)OUT OF SERVICE:1)2)3)4)5)3)Perform all maintenance once a year even if hour level has not been reached.Consult manufacturer's maintenance schedule, note on chart.Whenever necessary.More often if necessary.After first 50 hours, then after 100 hours, then at every 250 hours.6) Clean injection nozzles every 1500 hours.7) For EPA emission standards fuel nozzle needs to be cleanedevery 1500 hours, the fuel nozzle and fuel pump need to becleaned, adjusted, or repaired every 3000 hours, and the qualityguarantee for these parts is 1500 hours or 2 years.OM844W2 10/0912
Service Record NotesOM844W2 10/0913
ServicingLUBRICATION - GENERALSP1. CHECKING OIL LEVEL1. Use only clean, high quality lubricants stored inclean containers in a protected area.2. These lubricants are acceptable:a. API Service CC/CD/CE single viscosity oils.b. API Service CC/CD/SF multi-viscosity oils.3. Use the proper weight oil for your average operation temperature.1. Check the oil level in the crankcase with the dipstick(Fig. 5). The oil level must be in the waffled areaon the stick. Never allow the level to go below thisarea. Follow the lubrication recommendations bove 32 F(0 C)SAE 30WSAE 15-40W-10 to 32 F(-23 to 0 C)SAE 10WSAE 10-30WBelow -10 F(-23 C)SAE 5WSAE 5-20WFigure 4: Lube Oils4. Some increase in oil consumption may beexpected when SAE 5W and SAE 5-20W oils areused. Check oil level frequently.5. Never put additives or flushing oil in crankcase.SP2. OIL CHANGES1. The set is delivered with special break-in oil.Change the engine oil and oil filter after 50 hoursof operation. Use Service CC 30 weight oil duringthe first 100 hours.2. Change the oil and filter again at 100 hours using theoil recommended in the above diagram. After this,change oil and filter every 250 hours.3. During intermittent cold weather operation, changeoil every 100 hours or six weeks, whichever comesfirst.4. Change oil at the end of each season and thebeginning of each season.5. Change oil when engine is warm.6. Dispose of waste oil in an approved manner.7. Never use a flushing oil.8. Loosen the clamp on the oil change tube. Removecap. Drain oil. Replace the cap and tube.9. Refill engine with recommended oil for the season.10. Engine capacity with new oil filter is:844W2 and 844LW2 – 2.1 gallons(8.2 liters)SP3. CHANGING LUBE OIL FILTER1. Change the lube oil filter every 250 hours.2. Use a filter wrench to remove old filter. Dispose offilter in approved manner.3. Make sure the gasket from the old filter is removedand discarded. Clean mount face.4. Spread a thin film of engine oil on the rubber gasketon the new filter and screw it on nipple until gasketmeets the sealing surface.5. Using hands only – no wrench – tighten filterone-half turn farther. Overtightening can dodamage to filter housing.6. Fill engine with recommended oil. Start engine andcheck for leakage. Stop engine, wait 3 minutes, andcheck oil level. Add additional oil if necessary.7. Oil filter part number is:844W2 and 844LW2 – #24-03100Figure 5Figure 6OM844W2 10/0914
ServicingSP4. AIR CLEANER1. Inspect air cleaner every 250 hours. In dusty conditions, check more often.2. Marine sets: if dirty, wash element in soapy water.Rinse and dry thoroughly before re-installing.Replace if necessary. Part numbers are:M844W2 and M844LW2 – #24-231003. C-Series sets: the element cannot be cleaned.Replace it when necessary. Part number is:M20CRW2 – #24-28401Figure 8: Valve Adjustment4. NOTE: Make absolutely sure no impurities enterthe engine while changing the element. Do NOTrun the engine with the air cleaner removed.SP6. VALVE CLEARANCES1. Adjust valve clearance after 1000 hours or asneeded.2. Valve adjustments should be done after the cylinderhead bolts have been re-tightened. Engine should becold and NOT running.3. Watch the valves while turning the engine over byhand. Turn until the inlet valve starts to open andthe exhaust valve starts to close (the valves arerocking). Then turn the crankshaft one more fullturn and adjust the clearance on both valves for thiscylinder.Align the top mark of the crank pulley with the topmark of the timing gear case.4. Loosen the lock nut and adjust the clearancebetween the rocker arm and valve guide of both theintake and exhaust valves with the adjustment screw(Figure 8). Clearance on both intake and exhaustvalves should be 0.008 in. (0.2 mm).5. Repeat steps 3 and 4 for each cylinder. Each set ofvalves must be adjusted individually.6. Replace the rocker arm cover. Tighten cover nuts to5 - 8 ft/lbs (0.8 - 2.3 kg/m).SP5. V-BELTS1. Check the tension and wear on the V-belt daily.2. Use your thumb to press on the belt at the midpointbetween the crankshaft and alternator pulleys. Thetension is correct if the belt can be depressed about3/16 in. (5 mm) .CylinderNo. 1No. 2No. 3No. 4ValveArrangementInInInInExExExExWhen No. 1cyl. is at TDCin compressionstrokeWith thecrankshaftturned by 3600in normaldirection fromaboveFigure 7: 844W2 and 844LW2 Valve sequenceOM844W2 10/0915
ServicingSP7-9. FUEL FILTERSFUELS - GENERAL1. Use only clean, high quality fuels of the followingspecifications, as defined by ASTM designationD975 for diesel fuels:a. Use grade no. 2 diesel at ambient temperaturesabove freezing 32 F (0 C).b. Use grade no. 1 at ambient temperatures belowfreezing and for all temperatures at an altitudeof above 5,500 ft. (1500 meters).2. Use fuel having less that 1% sulphur (preferablyless that 0.5%).3. The cetane number should be a minimum of 45.4. DO NOT use these unsuitable grades of fuel:a. Domestic heating oils, all types.b. Class B engine.c. Class D domestic fuels.d. Class E, F, G or H industrial or marine fuels.e. ASTM-D975-60T No. 4-D and higher numberfuels.f. Diesel fuel with engine oil mixed in.5. Do not use any fuel additive other than anauthorized diesel fuel biocide if fungus or bacteriacause fuel system problems.6. Storing fuel:a. Keep dirt, scale, water, and other foreignmatter out of fuel.b. Avoid storing fuel for long periods of time.c. Fill the fuel tank at the end of each day’soperation. This will reduce condensation andpossible biological contamination.d. If biological contamination is detected orsuspected, contact your dealer for assistance.PrimaryFuel FilterPart NumbersComplete Unit:24-50002Element:24-50012Figure 9: Primary Fuel Filter.1. Your generator set should have a primary fuel filterinstalled. We recommend the Racor brand of fuelfilter-water separators.a. Check the primary fuel filter daily asrecommended by the filter manufacturer.Empty the collection bowl as necessary.b. Change the element as often as necessary orevery 500 hours.c. If the bowl fills with water, change the primaryand secondary element immediately.2. Change secondary fuel filter every 500 hours.NOTE: The fuel filter on the engine is considered the“secondary fuel filter.”a. Remove the spin-on filter by turning itcounterclockwise with a filter wrench. Fill thenew cartridge with fuel and install it afterapplying engine oil to gasket surface. Screw onuntil the gasket surface comes into contact withsealing surface of filter base. Then, tighten ittwo-thirds of a turn by hand. Do not overtighten.b. Fuel filter part numbers are:844W2 and 844LW2 – #24-52020OM844W2 10/0916
ServicingSP10. BLEEDING THE FUEL SYSTEMCAUTION: Escaping diesel fuel under pressure can penetrate skin causing serious personal injury.Before disconnecting lines be sure to relieve all pressure. Before applying pressure, be sure all connections are tight and lines, pipes and hoses are not damaged. Fuel escaping from a very small hole can bealmost invisible. Use a piece of cardboard or wood, rather than hands, to search for suspected leaks. Ifinjured by escaping fuel, see a doctor at once. Serious infection or reaction can develop if proper medicaltreatment is not administered immediately.Figure 10: M844W2/ M844LW2 Fuel System.1. The fuel system is self-bleeding. However, anysystem may need manual bleeding when:a. A new fuel filter is installed;b. The engine has run out of fuel;c. The fuel lines, injection pump or any other fuelsystem component has been removed andinstalled.2. Loosen bleed bolt “A” (Figure 10) on top of thefilter. Pump hand primer “B” on fuel lift pump untilpure fuel (no bubbles) escapes from bleed bolt “A”.Tighten bleed screw “A”.3. Loosen bleed screw “C”. Pump hand primer “B”until pure fuel (no bubbles) escapes. Then tightenbleed screw “C”.4. If the engine does not start after the above bleeding process, loosen a fuel line at the injector whilecranking the engine with the starter motor until purefuel escapes. Then tighten the connection. Do eachline one-at-a-time.5. After the engine has started, use a piece of cardboardto look for fuel leaks.OM844W2 10/0917
ServicingFor illustration purposes only, your unit may vary.Figure 11: Remove delivery line flare nuts.Figure 15: Remove return line.Figure 12: Remove delivery lines.Figure 16: Unscrew injector.Figure 13: Cover lines, inlets and injection pump outlets.Figure 17: Remove and replace copper sealing washer.Figure 14: Remove return line nuts.Figure 18: Reinstall injector. Torque to proper tightness.OM844W2 10/0918
ServicingSP11. INJECTOR SERVICEfor leaks using a piece of paper or cardboard.DO NOT use hand to check for leaks.1. Injectors should be checked every 1000 hours.Check should be made by a Northern Lights dealeror local injection repair station. Have your dealercheck the fuel injection nozzle spray pattern withinjection nozzle tester. If the starting pressure is toohigh or the spray pattern is off, abnormal fuel combustion could take place causing low engine outputand black exhaust smoke.SP12. INJECTION PUMP1. Since operating conditions may vary considerably, itis difficult to give a definite interval for checking theinjection pump. But as a rule, pump settings,maximum speed, idle speed and exhaust smokeshould be checked after every 2500 hours ofoperation. Service of the fuel injection pump shouldonly be done if checks indicate pump malfunction.2. Black smoke can be an indication of pumpmalfunction. Before servicing the pump, check otherpossible causes:a. Check cleanli
M844W2 marine generator sets, M844LW2 marine generator sets, and M20CRW2 commercial generator sets. NOTE: There are two versions of the 844W2 engine. The standard engine is designated 844W2. The long-stroke engine is designated 844LW2. You will need to know whi
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WELCOME TO THE NORTHERN LIGHTS CONFERENCE CENTER. The space to bring people together, and the tools to make it productive! INNONLAKESUPERIOR.COM FOR MORE INFORMATION CALL 218.625.0406 PAGE 4. Northern Lights Ballroom Northern Lights 1 Northern Lights 2 Copper Harbor Room Rock Harbor Room Eagle Harbor Room s ft. 3,136 1,540 1,540 770 770 .
Northern Lights marine diesel generator set with a 753 engine, PXK generator end, and an AVR. Northern Lights industrial generator set with a 753 engine, PXK generator end, and and AVR. M 753K M / NL 753 NL Your set has three serial numbers: 1 an engine number stamped on the block, 2 a generator plate, and 3 a generator set plate.
143-18 Grommet for 64 mm lights, recessed w/ open back, PC 144-18 Grommet for 64 mm lights, recessed w/ closed back, PC 2594 Cam-on surface mount bracket for 64 mm lights 146-18 Mounting grommet for 51 mm lights, open back, FLUSH 146-182 Mounting grommet for 51 mm lights, closed back, PC 146-184 Mounting grommet for 51 mm lights, open back, PC
parking lights and dashboard lights are lighted up. “ ”:in this position, the backlights, parking lights and dashboard lights are lighted up. “ · ”: in this position, the headlights, backlights, parking lights and dashboard lights are powered off. ENGINE BUTTO
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Jun 14, 2017 · Turbocharger Starter Relay. 38 - 41 GROUP 6 - GASKETS GROUP 3 - COOLING SYSTEM Engine . with a John Deere 4045 engine, 55 kW. Northern Lights Tier III marine diesel generator set with a John Deere 4045 engine, 65 kW. Northern Lights Tier III turbocharged marine diesel generator set with a John Deere 404
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